org.apache.calcite.adapter.clone

Class ColumnLoader<T>

java.lang.Object

org.apache.calcite.adapter.clone.ColumnLoader<T>

Type Parameters:

T - Element type of source table

class ColumnLoader<T>
extends Object

Column loader.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	ColumnLoader.Kev Key-value pair.
(package private) static class	ColumnLoader.ValueSet Set of values of a column, created during the load process, and converted to a serializable (and more compact) form before load completes.

Field Summary

Fields

Modifier and Type	Field and Description
private static com.google.common.base.Function<Date,Integer>	DATE_TO_INT
(package private) static int[]	INT_B
(package private) static int[]	INT_S
List<T>	list
(package private) static long[]	LONG_B
(package private) static int[]	LONG_S
List<ArrayTable.Column>	representationValues
int	sortField
private static com.google.common.base.Function<Time,Integer>	TIME_TO_INT
private static com.google.common.base.Function<Timestamp,Long>	TIMESTAMP_TO_LONG
private JavaTypeFactory	typeFactory

Constructor Summary

Constructors

Constructor and Description
ColumnLoader(JavaTypeFactory typeFactory, Enumerable<T> sourceTable, RelProtoDataType protoRowType, List<org.apache.calcite.avatica.ColumnMetaData.Rep> repList) Creates a column loader, and performs the load.

Method Summary

Modifier and Type	Method and Description
(package private) static int[]	invert(int[] targets)
(package private) static boolean	isIdentity(int[] sources)
private void	load(RelDataType elementType, List<org.apache.calcite.avatica.ColumnMetaData.Rep> repList, int[] sort)
(package private) static int	log2(int v)
(package private) static int	log2(long v)
(package private) static int	nextPowerOf2(int v)
(package private) static long	nextPowerOf2(long v)
int	size()
private static List	wrap(org.apache.calcite.avatica.ColumnMetaData.Rep rep, List list, RelDataType type) Adapt for some types that we represent differently internally than their JDBC types.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INT_B

static final int[] INT_B

INT_S

static final int[] INT_S

LONG_B

static final long[] LONG_B

LONG_S

static final int[] LONG_S

TIMESTAMP_TO_LONG

private static final com.google.common.base.Function<Timestamp,Long> TIMESTAMP_TO_LONG

TIME_TO_INT

private static final com.google.common.base.Function<Time,Integer> TIME_TO_INT

DATE_TO_INT

private static final com.google.common.base.Function<Date,Integer> DATE_TO_INT

list

public final List<T> list

representationValues

public final List<ArrayTable.Column> representationValues

typeFactory

private final JavaTypeFactory typeFactory

sortField

public final int sortField

Constructor Detail

ColumnLoader

ColumnLoader(JavaTypeFactory typeFactory,
             Enumerable<T> sourceTable,
             RelProtoDataType protoRowType,
             List<org.apache.calcite.avatica.ColumnMetaData.Rep> repList)

Creates a column loader, and performs the load.

Parameters:

typeFactory - Type factory

sourceTable - Source data

protoRowType - Logical row type

repList - Physical row types, or null if not known

Method Detail

nextPowerOf2

static int nextPowerOf2(int v)

nextPowerOf2

static long nextPowerOf2(long v)

log2

static int log2(int v)

log2

static int log2(long v)

invert

static int[] invert(int[] targets)

isIdentity

static boolean isIdentity(int[] sources)

size

public int size()

load

private void load(RelDataType elementType,
                  List<org.apache.calcite.avatica.ColumnMetaData.Rep> repList,
                  int[] sort)

wrap

private static List wrap(org.apache.calcite.avatica.ColumnMetaData.Rep rep,
                         List list,
                         RelDataType type)

Adapt for some types that we represent differently internally than their JDBC types. Timestamp values that are not null are converted to long, but nullable timestamps are acquired using ResultSet.getObject(int) and therefore the Timestamp value needs to be converted to a Long. Similarly Date and Time values to Integer.